51% Attack is a attack_type tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed April 26, 2026; most recent activity April 26, 2026.
On April 25, 2026, Litecoin experienced a significant 13-block chain reorganization after attackers exploited a zero-day vulnerability in its MimbleWimble Extension Block (MWEB) protocol. The vulnerability allowed…